Pressure-regulator.



PATENTED FEB. 6

A. GARMIGHAEL, DEGD. A. B. OARMIGHABL, ADMINISTRATOR.

PRESSURE REGULATOR.

APPLIGATION FILED JAN. 1e. 1905.

i UNITED HsTi-iTnps PATENT OFFICE.

ALBERT B. OARMIOHAEL, OF WESTERLY, RHODE ISLAND, ADMINISTRATOR OFALEXANDER CARMIOHAEL, DEOEASED.

PRESSURE-REGULATOR..

Specication of Letters Patent.

Patented Feb. 6, 1906.

To all whom, t 'nt/.ty concern:

Be it known that ALEXANDER CARMI- ci-IAEL, deceased, late a citizen ofthe United States, and a resident of Westerly, in the county ofWashington and State of Rhode j Island, did invent a certain new anduseful the general construction set forth in the pat- 4in-that patent.

ent to said ALEXANDER CARMIGHAEL, dated January 6, 1903, No. 717,810.All details not herein set forth will be understood to be in accordancewith the corresponding details As in the former patent, a softpackingsheet in the form sometimes known as cups leather is used andheld by compressing it axially. The hole to allow the small flow ofwater required is continued through the soft material, and the hole iskept open by applying a small tube of metal to guard the hole by whichit passes the soft material. All this was in the previous patent. Now aflange of metal extending from the tube, providing a countersink in thehard material to accommodate it, is added. In the most complete form ofthe invention there are two such flanges,

and the hard material is recessed to receive both. To attain thiscondition with facility for applying and removing, each tube is made intwo short lengths, telescoped one within the other. The flanges guardvery efficiently against the tube becoming tilted or inclined. Anothersafeguard against the displacement of these parts is attained by makingthe soft material with one or more sectors thicker than the otherportion and correspondingly recessing the metal adjacent.

The following is what is considered the best means of carrying out theinvention.

The accompanying drawings forni a part of this specification.

Figure 1 is a general longitudinal section through the piston and theadjacent parts. Fig. 2 is a corresponding section of the parts involvingthe novelty on a larger scale. Fig. 3 is a section corresponding to Fig.2 on a still larger scale. Fig. 4 is a plan view corresponding to Fig. 3seen from below, and Fig. 5 is a perspective View of one of the metallicthimbles with a section of the immediately-Mijas cent portions of thesoft layer.

Figs. 7

and 8 are sections corresponding to Fig. 3,

but showing inodi'cations.

Similar letters of refei'ence indicate corre spending parts in all thefigures where they appear.

B is the piston; B B2, the ordinary hollow cylindrical extensions. Itwill be understood that the piston works within the correspending hollowcylinder D in the same `manner as in the previous patent referred to.

C C are plates of iron or other suitable rigidlmaterial, one of which issecured upon each end of the piston B, respectively, by a nut.

F is soft sheet of vulcanized rubber serving as a packing. This packingis compressed between each plate O and the adjacent end of the piston B.It is mainly a disk extending outward, but having its edge flanged inthe manner of a cup-leather The improvement is applied at each end ofthe piston; but description of one end will serve for both.

Around the hole which forms a portion of a passage b, through which thewater `flows when required, a short tube of hard metal M, extendingthrough the soft packing and a little Way into the adjacent hard parts,is provided, these latter parts being counterbored to receive them. Theshort tube M is in two lengths, differing just enough in diameter toallow one to extend within the other. Each has a flange near itsmid-length. This avoids the difficulty heretofore experienced in shorttubes becoming sometimes tilted over on one side, with theeffect'tonearly stop the passage.

The means described will serve well alone; but the invention providesfurther security against any turning motion of the soft packing aroundthe axis of the piston. The adjacent face of the piston is sunk orrecessed in a segmental form, and the rubber of the soft disk is castwith a corresponding segment thickened. In applying the parts togetherthe thick portion of the packing-disk locks in the recess in the pistonand forbids its turning.

The invention does not increase materially the labor or cost of themanufacture or add any difficulties in assembling and separating theparts. It gives a certainty never before attainable that the' devicewill remain in IOO condition for successful working for a long period.

In what is esteemed the most complete 'formof the invention each of thetubes M is Vmade in two parts, one part telescoped within the otherpart. These may be made with a web on each part. Figs. l, 2, 3, 4, 5,and 6 show such compound construction, one part of the tube with its webap lying from the inside and the other part applying from the outside ofthe soft disk, and both the body of the piston and the adjacent hardplate C being recessed to allow the web to be received withoutdisturbing the nice iit ofthe several parts together.

Modifications may be made Without departing from the principle orsacrificing the advantages of the invention. The flanges on the edges ofthe soft packing-disk F can be widened or they can be narrowed untilthey have disappeared altogether. The thickness of the plates C can bevaried. Care is taken to make the sector of increased thickness F in thesoft disk (one sixth or other fraction of the disk) always of suchdimensions as to fill or very nearly fill the corresponding recessprovided in the hard part adjacent.

Fig. 6 shows the same as Fig. 3, with the addition of a pin N,corresponding to the pin similarly marked in the previous patentreferred to. There is no objection to this pin, a corresponding holealways bein made in the packing layer and also in the p ate C and howsuch can be used, if desired is herein shown.

Parts of the invention can be used without others. Instead of making thetube M with its web M in two parts applied to the soft packing from boththe outside and inside and telescoping together the invention can bemade to serve usefully in a simpler form by having the whole of eachshort tube in one piece with only one web M. Fig. 7 shows such with thetube applied from the inside. Fig. 8 shows such with the tube appliedfrom the outside. For suchuse only one of the adjacent parts B or C needbe recessed. The form shown in Figs. 1 to 6 is preferred.

The figures show only one of the thickened sections on each of the softpackings. There may be two or still more, if desired, always taking careto have same number and the same form and arrangement of the recesses.

What I claim isl. In a piston having a passage, a soft disk having acorresponding passage and a follower counterbored as described, and atube having a web near its mid-length combined and arranged to servesubstantially as herein specified.

2. The tube M in separable parts of different diameter and one having aweb M in combination with a soft disk, having an aperture adapted toreceive it, and with a piston and a follower having each a passage andone counterbored, all substantially as herein specified.

3. A soft disk having a thick segment and an aperture in combinationwith a short tube having a web near its mid-length and with acorrespondinglyapertured piston and follower, one of which is recessedto match, all substantially as herein specified.

' Signed by the administrator of the estate ofthe said ALEXANDERCARMICHAEL at Westerly aforesaid, in the county of Washington and Stateof Rhode Island, this 31st day of December, A. D. 1904.

ALBERT B. CARMICHAEL,

Administrator. Witnesses:

LoUIs FARERIO, BERNARD LYNCH.

